Checking The Refrigeration Cycle; Checking The Refrigerant Amount - Kubota KX080-3 Workshop Manual

WSM KX080-3 Service
e. Checking the refrigeration cycle
hec ing the refrigeration cycle
hec ing the refrigerant amount
hec ing the refrigerant gas pressure
epairing efecti e spot(s)
ouble-chec ing

(1) Checking the refrigerant amount

1. Using a gauge manifold
1) Attach a gauge manifold in position and place the machine in the following conditions.
Door
Air conditioner (magnetic clutch)
Engine rpm
Inside/outside air select damper position
Temperature setting
Blower speed
High-pressure side level
1: If the outside air temperature is higher than 40
2
MPa (19 kgf/cm
speed to LO, and/or (2) park the machine in a workshop or in the shade, in order to get the level
lower than 1.86 MPa (19 kgf/cm
2) Check the pressure reading of the gauge manifold.
Pressures when the refrigerant gas charge is as specified
Low-pressure side level
High-pressure side level
Troubleshooting the refrigeration cycle
eco ering the refrigerant
eplacing efecti e part(s)
harging the refrigerant
erformance test
Item
) in the above conditions. In such case, (1) fully close the door and set the blower
2
).
Using a gauge manifold
Using the sight glass
Using a gauge manifold
Fully open
ON
1500 rpm
Inside air mode
MAX COOL (Coolest)
HI
Below 1.86 MPa (19 kgf/cm
, the high-pressure side level may be above 1.86
°C
0.15 0.25 MPa (1.5
1.37 1.57 MPa (14
VI-S-11
VI Air Conditioner
Conditions
2
)
2
2.5 kgf/cm )
2
16 kgf/cm )